Pilot

Basic pre-requisites to apply for a commercial pilot course is mentioned below:
1) You must complete Class XII under the 10+2 system or its equivalent with a minimum of 50 per cent marks in maths and physics.
2) You must be at least 16 years of age to be eligible for a Student Pilot License, 17 for a Private Pilot License, and 18 for a Commercial Pilot License.
3) Alternatively, you could directly enroll for the Private Pilot License once you have cleared Class XII and are 17 years old. This involves taking an exam conducted by the Directorate General of Civil Aviation* consisting of theory papers on air navigation, aviation meteorology, air regulation and technical aspects.
4) Your vision in one eye must be perfect. In general medical terminology, it is called 6/6 eyesight. In the other eye, you could have an imperfection of 6/9, which must be correctable to 6/6.
5) General physical fitness is mandatory. You must be free of any disease that can hamper normal function.
6) You need to complete the requisite number of hours, clear written papers and the medical examination. You need 70 percent marks to pass in each of these papers. You can keep appearing until you clear them.
Note: The application form is available at all flying clubs. You can also write to the Directorate General of Civil Aviation. Send a self-addressed envelope, requesting them to send it back to you. Regards.

Talking of doing CPL and then thinking of doing it at cheap cost are two far ends.
Doing CPL is a costly affair and it requires the candidate to fly actual aircraft and since it is a professional course it should be done under the guidance of experienced and well trained instructors.
You may find cheap flying clubs in Phillipines, many go there to do their CPL training and after returning they convert their license to Indian license.
But there's another fact related to it, that a couple of years ago Phillipines was black listed by DGCA for doing CPL. Although now the restrictions have been lifted off.
Experienced and professional instructors and examiners shall train you to be a good pilot whereas you may just do a formality by doing it from any cheaper institutes.
Decide wisely before you enrol into any flying school and do check it's credibility in DGCA's records.

To be a commercial pilot, there is a specific eligibility criteria which you should first be aware of. This is decided on what subjects have you taken in class 12th. It requires PCM to be a pilot. And, even if you have not opted for the same, then you can appear separately for these subjects and become eligible.
Further, you should be aware that you are medically fit to be a pilot, so I would suggest you to visithttp://www.dgca.nic.in/medical/medical-ind.htmand go to the class 2nd examiners tab to find out doctors who will examine you for initial fitness. You can visit any doctorate from the list as per your convenience.
Once you are done with Class 2nd medical, find out a suitable flying club for you as per your convenience. You can fly in India or abroad. I would suggest you fly in India.
Besides finding the club, be aware that you will have to appear for:
1. Air Navigation
2. Aviation Meteorology
3. Air Regulations
4. Aviation Technical
5. Aircraft Specific
6. Radio Telephony
Here, 1-5 are conducted by DGCA and 6 is conducted by WPC. Prepare for these subjects and appear, as exams are conducted every quarterly. For preparation, Flying Club will help you or there are private instructors available in metro cities as well.
You will fly for 200Hrs + Clear DGCA and WPC exams + Clear Class 1st medical, then you shall get your CPL. The next license is ATPL, which you shall be able to apply for once.
You will then have to probably fund or self-sponsor your type rating on whatever fleet you are selected in an airline.
Then, you finally get a job as a pilot.
I hope the process is well explained to you.
CPL is an expensive affair. It might cost you around Rs.18-20 Lacs for flying + DGCA exams Rs.500/- each exam + Medicals for Rs.10,000 + endorsements and license issue fees around Rs.25k + Type Rating around Rs.15 Lacs.

To become a commercial pilot, you should first be aware of the eligibility. This is decided on what subjects have you taken in class 12th.It requires PCM to be a pilot. And, even if you have not opted for the same, then you can appear separately for these subjects and become eligible.
Further, you should be aware that you are medically fit to be a pilot, so I would suggest you to visithttp://www.dgca.nic.in/medical/medical-ind.htmand go to the class 2nd examiners tab to find out doctors who will examine you for initial fitness. You can visit any doctorate from the list as per your convenience.
Once you are done with Class 2nd medical, find out a suitable flying club for you as per your convenience. You can fly in India or Abroad. I would suggest you fly in India.
Besides finding the Club, be aware that you will have to appear for:
1. Air Navigation
2. Aviation Meteorology
3. Air Regulations
4. Aviation Technical
5. Aircraft Specific
6. Radio Telephony
Here, 1-5 are conducted by DGCA and 6 is conducted by WPC. Prepare for these subjects and appear, as exams are conducted every quarterly. For preparation, Flying Club will help you or there are private instructors available in Metro Cities as well.
You will fly for 200Hrs + Clear DGCA and WPC exams + Clear Class 1st medical, then you shall get your CPL. The next license is ATPL, which you shall be able to apply for once.
You will then have to probably fund or self-sponsor your type rating on whatever fleet you are selected in an airline.
Then, you finally get a job as a pilot.
I hope the process is well explained to you.
CPL is although an expensive affair. It might cost you around Rs.18-20Lacs for flying + DGCA exams Rs.500/- each exam + Medicals for Rs.10,000 + endorsements and license issue fees around Rs.25k + Type Rating around Rs.15Lacs.
So decide wisely before you enter the field.

Getting a Job after completing CPL depends on the present market needs.
Nowadays, airlines have started looking towards type rated candidates. Some airlines have also switched to training the candidates through their own cadet pilot programmes.
There are some airlines who actually hire candidates who have a commercial pilot license and the selection process includes:
1. Technical Exam
2. Compass Test
3. Interview
4. Medicals
5. Induction.
Some airline also put Psychometric test and group discussion, as a part of their selection procedure.
Others who look for candidates with Type Rating on certain fleet like Airbus or Boeing or ATR, for simulator check and interview followed by medicals.
You may target vacancies for CPL holders, which are comparatively less in numbers when compared to those of type rated pilots.
So, after CPL, you may have to go for type rating depending on which airline you are targeting and of course, the decision shall also be influenced by the current market.
So, extra expenses after CPL is of getting type rated on any particular fleet to get a job and that depends on the current market needs.

Both the profiles that you have mentioned here are way different from each other. There is nothing comparable between them. Hence, there are only and only difference.
Commercial Pilot flies the plane and does the operational duty for the airline whereas someone who has done B.Sc. Aviation might be working for any department as per the company requirements. It may be operations, ground handling, ramp duties, cargo, hub control, etc.
B.Sc Aviation is merely a graduation degree which allows you to call yourself a graduate and hence, eligible for any job that requires it's candidates to be a graduate.
And, on the other hand, Commercial Pilot Course is a professional training which helps you earn a Commercial Pilot License and hence, you qualify to apply as a pilot for any airline that is hiring fresh CPL pilots.
I hope the things are clear now!

To have a training for the pilot, one should have passed 10+2 or equivalent exam with Physics, Chemistry, and Mathematics. For admission, there is a written test that comprises test papers like English, Maths, physics, reasoning, general awareness, and current affairs. The minimum age to get enroll in a pilot training institute is 17 years. One has to fulfill the medical standard as prescribed by the Directorate General of Civil Aviation (DGCA). The training fee is Rs. 25 Lacs and involves 200 hours of flying training. The duration of the course is 15-18 months. There are institutes in India, which are offering pilot training in India
- Indira Gandhi Rashtriya Urban Akademi, Rae Bareli (IGRU) (wwww.igrua.gov.in)
- Orient Flight School, Chennai (www.orientflights.com)
- Puducherry Thakur College of Aviation
- Institute of Aviation and Aviation Safety.